Method of making an electric motor

Abstract

A method of making an electric motor where the motor has a reduction gear and a gear cover mounted thereon. An opening is formed through the gear cover at a location corresponding to a connection portion. A pressure member is inserted into the gear cover through the opening and is pressed against another pressure member to squeeze a choke coil and a connection plate. High current may flow through the pressure members for a short time to weld the choke coil and the connection plate together by way of resistive heating.

We claim: 
     
       1. A method of making an electric motor having a reduction gear and a gear cover detachably mounted thereon, comprising the steps of: forming a receiving portion for receiving an electric part and a connection plate electrically connected to said electric part on the outer side of said gear cover, said connection plate having a connection portion to said electric part, said connection plate being open on one side which is covered by a removable receiving cover;   forming a opening through said gear cover at a location corresponding to said connection portion;   inserting one pressure member into said gear cover through said opening; and   urging said one pressure member against another pressure member inserted from said one side with said receiving cover removed to squeeze said connection portion and connect said electric part to said connection plate.   
     
     
       2. A method of making an electric motor as defined in claim 1 by connecting said electric part to said connecting plate wherein said pressure members are used as electrodes through which an electric current is flowed for a given time period to heat said electric part and said connection plate through resistive heating. 
     
     
       3. A method of making an electric motor as defined in claim 2 wherein said connection plate has a holding portion for temporarily holding said electric part prior to squeezing and said connection portion is squeezed after said electric part has been held by said holding portion. 
     
     
       4. A method of making an electric motor as defined in claim 2 wherein said electric part and said connection plate are welded together through said resistive heating. 
     
     
       5. A method of making an electric motor as defined in claim 4 wherein said connection plate has a holding portion for temporarily holding said electric part prior to squeezing and said connection portion is squeezed after said electric part has been held by said holding portion. 
     
     
       6. A method of making an electric motor as defined in claim 4 wherein a plurality of said connection portions are provided and said opening is formed widely corresponding to said connection portions and said pressure members are provided to squeeze said connection portions at the same time and connect said electric part to said connection plate. 
     
     
       7. A method of making an electric motor as defined in claim 2 wherein a plurality of said connection portions are provided and said opening is formed widely corresponding to said connection portions and said pressure members are provided to squeeze said connection portions at the same time and connect said electric part to said connection plate. 
     
     
       8. A method of making an electric motor as defined in claim 1 wherein a plurality of said connection portions are provided and said opening is formed widely corresponding to said connection portions and said pressure members are provided to squeeze said connection portions at the same time and connect said electric part to said connection plate. 
     
     
       9. A method of making an electric motor as defined in claim 8 wherein said connection plate has a holding portion for temporarily holding said electric part prior to squeezing and said connection portion is squeezed after said electric part has been held by said holding portion. 
     
     
       10. A method of making an electric motor as defined in claim 1 wherein said connection plate has a holding portion for temporarily holding said electric part prior to squeezing and said connection portion is squeezed after said electric part has been held by said holding portion.